what does the steady development of tools in the hunter-gatherer societies suggest about early human's intelligence?

Hunter-gatherer societies are – true to their astoundingly descriptive name – cultures in which human beings obtain their food by hunting, fishing, scavenging, and gathering wild plants and other edibles. Although there are still groups of hunter-gatherers in our modern world, we will here focus on the prehistoric societies that relied on the bounty of nature, before the transition to agriculture began around 12,000 years ago

Yes, they are always very triggered